./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:24:47,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:24:47,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:24:47,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:24:47,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:24:47,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:24:47,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:24:47,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:24:47,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:24:47,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:24:47,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:24:47,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:24:47,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:24:47,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:24:47,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:24:47,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:24:47,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:24:47,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:24:47,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:24:47,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:24:47,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:24:47,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:24:47,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:24:47,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:24:47,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:24:47,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:24:47,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:24:47,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:24:47,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:24:47,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:24:47,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:24:47,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:24:47,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:24:47,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:24:47,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:24:47,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:24:47,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:24:47,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:24:47,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:24:47,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:24:47,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:24:47,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:24:47,308 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:24:47,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:24:47,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:24:47,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:24:47,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:24:47,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:24:47,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:24:47,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:24:47,311 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:24:47,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:24:47,312 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:24:47,312 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:24:47,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:24:47,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:24:47,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:24:47,313 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:24:47,314 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:24:47,314 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:24:47,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:24:47,314 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:24:47,314 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:24:47,315 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:24:47,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:24:47,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:24:47,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:24:47,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:47,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:24:47,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:24:47,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:24:47,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:24:47,317 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:24:47,317 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:24:47,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:24:47,318 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-25 17:24:47,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:24:47,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:24:47,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:24:47,569 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:24:47,569 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:24:47,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-25 17:24:50,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:24:50,904 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:24:50,904 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-25 17:24:50,911 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data/6179c4039/6f13fa20356d4e0b91dc161ad3045f6c/FLAG05a11a5c3 [2022-11-25 17:24:50,931 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data/6179c4039/6f13fa20356d4e0b91dc161ad3045f6c [2022-11-25 17:24:50,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:24:50,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:24:50,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:50,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:24:50,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:24:50,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:50" (1/1) ... [2022-11-25 17:24:50,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f320acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:50, skipping insertion in model container [2022-11-25 17:24:50,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:50" (1/1) ... [2022-11-25 17:24:50,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:24:50,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:24:51,144 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,145 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,146 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,149 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,150 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,151 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,156 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,157 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,158 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,158 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,159 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,160 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:51,163 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:51,170 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-25 17:24:51,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:51,192 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 17:24:51,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f6561a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:51, skipping insertion in model container [2022-11-25 17:24:51,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:51,193 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:24:51,195 INFO L158 Benchmark]: Toolchain (without parser) took 255.47ms. Allocated memory is still 220.2MB. Free memory was 177.0MB in the beginning and 165.8MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:24:51,196 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 146.8MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:24:51,196 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.52ms. Allocated memory is still 220.2MB. Free memory was 176.2MB in the beginning and 165.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:24:51,198 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 146.8MB. Free memory is still 88.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 248.52ms. Allocated memory is still 220.2MB. Free memory was 176.2MB in the beginning and 165.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 126]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:24:53,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:24:53,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:24:53,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:24:53,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:24:53,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:24:53,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:24:53,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:24:53,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:24:53,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:24:53,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:24:53,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:24:53,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:24:53,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:24:53,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:24:53,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:24:53,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:24:53,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:24:53,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:24:53,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:24:53,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:24:53,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:24:53,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:24:53,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:24:53,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:24:53,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:24:53,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:24:53,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:24:53,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:24:53,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:24:53,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:24:53,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:24:53,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:24:53,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:24:53,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:24:53,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:24:53,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:24:53,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:24:53,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:24:53,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:24:53,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:24:53,639 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:24:53,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:24:53,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:24:53,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:24:53,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:24:53,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:24:53,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:24:53,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:24:53,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:24:53,680 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:24:53,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:24:53,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:24:53,681 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:24:53,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:24:53,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:24:53,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:24:53,682 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:24:53,682 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:24:53,682 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:24:53,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:24:53,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:24:53,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:24:53,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:24:53,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:24:53,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:24:53,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:24:53,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:24:53,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:24:53,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:53,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:24:53,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:24:53,685 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:24:53,685 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:24:53,686 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:24:53,686 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:24:53,686 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:24:53,686 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:24:53,687 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2022-11-25 17:24:54,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:24:54,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:24:54,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:24:54,109 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:24:54,110 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:24:54,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-25 17:24:57,119 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:24:57,353 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:24:57,354 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2022-11-25 17:24:57,361 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data/3897e1e0e/0e6028d9736b4d6ebe4d5f454d6c5cdd/FLAG7ea1b720b [2022-11-25 17:24:57,378 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/data/3897e1e0e/0e6028d9736b4d6ebe4d5f454d6c5cdd [2022-11-25 17:24:57,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:24:57,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:24:57,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:57,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:24:57,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:24:57,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:57,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@361fd9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57, skipping insertion in model container [2022-11-25 17:24:57,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:57,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:24:57,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:24:57,651 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,663 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,664 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,665 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,669 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,673 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,674 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,681 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,688 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,701 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-25 17:24:57,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:57,741 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:24:57,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:24:57,761 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,763 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,769 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,770 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,771 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,773 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,774 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,775 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,777 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,778 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,781 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,782 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,783 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,784 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,786 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,795 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-25 17:24:57,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:57,837 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:24:57,858 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,859 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,859 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,862 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,864 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,874 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,875 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,883 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,884 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,890 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:24:57,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:24:57,895 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2022-11-25 17:24:57,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:24:57,922 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:24:57,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57 WrapperNode [2022-11-25 17:24:57,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:24:57,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:24:57,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:24:57,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:24:57,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:57,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:57,995 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 158 [2022-11-25 17:24:57,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:24:57,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:24:57,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:24:57,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:24:58,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,025 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:24:58,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:24:58,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:24:58,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:24:58,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (1/1) ... [2022-11-25 17:24:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:24:58,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:58,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:24:58,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:24:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:24:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:24:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:24:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:24:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:24:58,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:24:58,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:24:58,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:24:58,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:24:58,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:24:58,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:24:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:24:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:24:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:24:58,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:24:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:24:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:24:58,135 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:24:58,262 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:24:58,265 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:24:58,860 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:24:59,049 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:24:59,049 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:24:59,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:24:59 BoogieIcfgContainer [2022-11-25 17:24:59,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:24:59,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:24:59,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:24:59,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:24:59,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:24:57" (1/3) ... [2022-11-25 17:24:59,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206908cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:24:59, skipping insertion in model container [2022-11-25 17:24:59,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:24:57" (2/3) ... [2022-11-25 17:24:59,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206908cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:24:59, skipping insertion in model container [2022-11-25 17:24:59,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:24:59" (3/3) ... [2022-11-25 17:24:59,061 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2022-11-25 17:24:59,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:24:59,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-25 17:24:59,098 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:24:59,217 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:24:59,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 163 transitions, 350 flow [2022-11-25 17:24:59,385 INFO L130 PetriNetUnfolder]: 10/160 cut-off events. [2022-11-25 17:24:59,386 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:24:59,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 160 events. 10/160 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-25 17:24:59,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 163 transitions, 350 flow [2022-11-25 17:24:59,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 155 transitions, 328 flow [2022-11-25 17:24:59,418 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:24:59,445 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 155 transitions, 328 flow [2022-11-25 17:24:59,450 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 155 transitions, 328 flow [2022-11-25 17:24:59,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 155 transitions, 328 flow [2022-11-25 17:24:59,517 INFO L130 PetriNetUnfolder]: 10/155 cut-off events. [2022-11-25 17:24:59,517 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:24:59,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 155 events. 10/155 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-25 17:24:59,522 INFO L119 LiptonReduction]: Number of co-enabled transitions 2120 [2022-11-25 17:25:25,932 INFO L134 LiptonReduction]: Checked pairs total: 3538 [2022-11-25 17:25:25,932 INFO L136 LiptonReduction]: Total number of compositions: 156 [2022-11-25 17:25:25,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:25:25,955 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60054806, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:25:25,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-25 17:25:25,959 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:25:25,959 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:25:25,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:25,960 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:25:25,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash 21861, now seen corresponding path program 1 times [2022-11-25 17:25:25,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:25,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680160966] [2022-11-25 17:25:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:25,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:25,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:25,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:26,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:25:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:25:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:26,338 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:25:26,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:25:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:26,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:26,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:26,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680160966] [2022-11-25 17:25:26,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680160966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:26,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:26,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:26,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950024196] [2022-11-25 17:25:26,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:26,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:26,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:26,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 319 [2022-11-25 17:25:26,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:26,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:26,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 319 [2022-11-25 17:25:26,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:27,050 INFO L130 PetriNetUnfolder]: 1020/1600 cut-off events. [2022-11-25 17:25:27,051 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2022-11-25 17:25:27,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3289 conditions, 1600 events. 1020/1600 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 8782 event pairs, 993 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 2917. Up to 1573 conditions per place. [2022-11-25 17:25:27,072 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-11-25 17:25:27,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 184 flow [2022-11-25 17:25:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2022-11-25 17:25:27,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47648902821316613 [2022-11-25 17:25:27,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2022-11-25 17:25:27,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2022-11-25 17:25:27,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:27,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2022-11-25 17:25:27,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:27,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:27,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:27,126 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 108 flow. Second operand 3 states and 456 transitions. [2022-11-25 17:25:27,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 184 flow [2022-11-25 17:25:27,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:25:27,138 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 94 flow [2022-11-25 17:25:27,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-11-25 17:25:27,146 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2022-11-25 17:25:27,146 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 94 flow [2022-11-25 17:25:27,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:27,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:27,147 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:25:27,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:27,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 21862, now seen corresponding path program 1 times [2022-11-25 17:25:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:27,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216066886] [2022-11-25 17:25:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:27,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:27,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:27,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:27,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:25:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:25:27,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:27,594 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:27,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:27,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:27,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:27,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216066886] [2022-11-25 17:25:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216066886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:27,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:27,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395373048] [2022-11-25 17:25:27,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:27,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:27,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 319 [2022-11-25 17:25:27,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:27,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:27,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 319 [2022-11-25 17:25:27,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:28,633 INFO L130 PetriNetUnfolder]: 2039/3198 cut-off events. [2022-11-25 17:25:28,633 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:25:28,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6438 conditions, 3198 events. 2039/3198 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 20080 event pairs, 1986 based on Foata normal form. 0/1339 useless extension candidates. Maximal degree in co-relation 6432. Up to 1574 conditions per place. [2022-11-25 17:25:28,659 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 76 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-11-25 17:25:28,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 81 transitions, 332 flow [2022-11-25 17:25:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2022-11-25 17:25:28,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2022-11-25 17:25:28,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2022-11-25 17:25:28,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2022-11-25 17:25:28,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:28,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2022-11-25 17:25:28,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,681 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 94 flow. Second operand 3 states and 493 transitions. [2022-11-25 17:25:28,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 81 transitions, 332 flow [2022-11-25 17:25:28,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 81 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:28,684 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 105 flow [2022-11-25 17:25:28,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-11-25 17:25:28,686 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2022-11-25 17:25:28,686 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 105 flow [2022-11-25 17:25:28,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:28,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:28,688 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:25:28,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-25 17:25:28,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:28,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash 21938, now seen corresponding path program 1 times [2022-11-25 17:25:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:28,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175305815] [2022-11-25 17:25:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:28,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:28,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:28,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:28,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:25:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:25:29,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:29,119 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-25 17:25:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-25 17:25:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:29,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:29,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:29,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175305815] [2022-11-25 17:25:29,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175305815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:29,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:29,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187585962] [2022-11-25 17:25:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:29,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:29,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 319 [2022-11-25 17:25:29,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:29,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:29,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 319 [2022-11-25 17:25:29,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:30,156 INFO L130 PetriNetUnfolder]: 1691/2688 cut-off events. [2022-11-25 17:25:30,157 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:25:30,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5424 conditions, 2688 events. 1691/2688 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 16695 event pairs, 1638 based on Foata normal form. 0/1189 useless extension candidates. Maximal degree in co-relation 5416. Up to 2634 conditions per place. [2022-11-25 17:25:30,177 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 17:25:30,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 179 flow [2022-11-25 17:25:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2022-11-25 17:25:30,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47439916405433646 [2022-11-25 17:25:30,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2022-11-25 17:25:30,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2022-11-25 17:25:30,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:30,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2022-11-25 17:25:30,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:30,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:30,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:30,186 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 105 flow. Second operand 3 states and 454 transitions. [2022-11-25 17:25:30,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 179 flow [2022-11-25 17:25:30,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:30,190 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 101 flow [2022-11-25 17:25:30,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 17:25:30,192 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2022-11-25 17:25:30,192 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 101 flow [2022-11-25 17:25:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:30,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:30,193 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:25:30,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:30,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:30,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:30,405 INFO L85 PathProgramCache]: Analyzing trace with hash 21936, now seen corresponding path program 1 times [2022-11-25 17:25:30,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:30,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805264025] [2022-11-25 17:25:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:30,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:30,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:30,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:25:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:25:30,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:30,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:30,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:30,616 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 17:25:30,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 17:25:30,649 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:25:30,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 17:25:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:30,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:30,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805264025] [2022-11-25 17:25:30,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805264025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:30,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:30,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:30,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774265081] [2022-11-25 17:25:30,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:30,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:30,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:30,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2022-11-25 17:25:30,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:30,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:30,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2022-11-25 17:25:30,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:31,359 INFO L130 PetriNetUnfolder]: 1343/2178 cut-off events. [2022-11-25 17:25:31,359 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:25:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4404 conditions, 2178 events. 1343/2178 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 13319 event pairs, 1290 based on Foata normal form. 0/1037 useless extension candidates. Maximal degree in co-relation 4395. Up to 2124 conditions per place. [2022-11-25 17:25:31,374 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-25 17:25:31,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 171 flow [2022-11-25 17:25:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2022-11-25 17:25:31,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4754440961337513 [2022-11-25 17:25:31,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2022-11-25 17:25:31,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2022-11-25 17:25:31,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:31,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2022-11-25 17:25:31,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,382 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 101 flow. Second operand 3 states and 455 transitions. [2022-11-25 17:25:31,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 171 flow [2022-11-25 17:25:31,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:31,384 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 98 flow [2022-11-25 17:25:31,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-11-25 17:25:31,385 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2022-11-25 17:25:31,385 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 98 flow [2022-11-25 17:25:31,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:31,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:31,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:25:31,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-25 17:25:31,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:31,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash 680302, now seen corresponding path program 1 times [2022-11-25 17:25:31,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:31,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048089913] [2022-11-25 17:25:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:31,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:31,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:31,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:31,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:25:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:25:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:31,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:31,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:31,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:32,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048089913] [2022-11-25 17:25:32,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048089913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:32,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:32,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:25:32,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356077808] [2022-11-25 17:25:32,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:32,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:25:32,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:25:32,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:25:33,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 319 [2022-11-25 17:25:33,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 134.0) internal successors, (804), 6 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:33,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:33,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 319 [2022-11-25 17:25:33,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:34,267 INFO L130 PetriNetUnfolder]: 2016/3270 cut-off events. [2022-11-25 17:25:34,268 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-25 17:25:34,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6611 conditions, 3270 events. 2016/3270 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 21334 event pairs, 1935 based on Foata normal form. 0/1559 useless extension candidates. Maximal degree in co-relation 6601. Up to 1063 conditions per place. [2022-11-25 17:25:34,295 INFO L137 encePairwiseOnDemand]: 315/319 looper letters, 101 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2022-11-25 17:25:34,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 111 transitions, 474 flow [2022-11-25 17:25:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:25:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:25:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 909 transitions. [2022-11-25 17:25:34,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47492163009404387 [2022-11-25 17:25:34,301 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 909 transitions. [2022-11-25 17:25:34,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 909 transitions. [2022-11-25 17:25:34,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:34,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 909 transitions. [2022-11-25 17:25:34,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:34,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:34,310 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:34,310 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 6 states and 909 transitions. [2022-11-25 17:25:34,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 111 transitions, 474 flow [2022-11-25 17:25:34,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 111 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:34,315 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 151 flow [2022-11-25 17:25:34,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-11-25 17:25:34,318 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2022-11-25 17:25:34,319 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 151 flow [2022-11-25 17:25:34,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 134.0) internal successors, (804), 6 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:34,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:34,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:25:34,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-25 17:25:34,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:34,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash 21097431, now seen corresponding path program 1 times [2022-11-25 17:25:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:34,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137332421] [2022-11-25 17:25:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:34,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:34,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:34,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:34,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:25:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:25:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:34,793 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-25 17:25:34,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-25 17:25:34,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-25 17:25:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:34,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:34,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137332421] [2022-11-25 17:25:34,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137332421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:34,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:34,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:34,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848769506] [2022-11-25 17:25:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:34,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:35,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2022-11-25 17:25:35,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:35,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:35,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2022-11-25 17:25:35,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:35,644 INFO L130 PetriNetUnfolder]: 1938/3129 cut-off events. [2022-11-25 17:25:35,645 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-25 17:25:35,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6355 conditions, 3129 events. 1938/3129 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 20449 event pairs, 1857 based on Foata normal form. 0/1521 useless extension candidates. Maximal degree in co-relation 6340. Up to 3048 conditions per place. [2022-11-25 17:25:35,689 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-11-25 17:25:35,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 43 transitions, 227 flow [2022-11-25 17:25:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2022-11-25 17:25:35,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47335423197492166 [2022-11-25 17:25:35,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2022-11-25 17:25:35,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2022-11-25 17:25:35,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:35,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2022-11-25 17:25:35,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:35,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:35,696 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:35,696 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 151 flow. Second operand 3 states and 453 transitions. [2022-11-25 17:25:35,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 43 transitions, 227 flow [2022-11-25 17:25:35,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 217 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:35,698 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 139 flow [2022-11-25 17:25:35,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2022-11-25 17:25:35,699 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2022-11-25 17:25:35,699 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 139 flow [2022-11-25 17:25:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:35,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:35,700 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:25:35,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:35,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:35,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash 21097430, now seen corresponding path program 1 times [2022-11-25 17:25:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:35,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315631372] [2022-11-25 17:25:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:35,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:35,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:35,914 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:35,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:25:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:25:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:36,073 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 17:25:36,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-25 17:25:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:36,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:36,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315631372] [2022-11-25 17:25:36,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315631372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:36,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:36,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413956925] [2022-11-25 17:25:36,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:36,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:36,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:36,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 319 [2022-11-25 17:25:36,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:36,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:36,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 319 [2022-11-25 17:25:36,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:36,980 INFO L130 PetriNetUnfolder]: 1860/2988 cut-off events. [2022-11-25 17:25:36,980 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-25 17:25:36,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6070 conditions, 2988 events. 1860/2988 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 19560 event pairs, 1779 based on Foata normal form. 0/1482 useless extension candidates. Maximal degree in co-relation 6054. Up to 2907 conditions per place. [2022-11-25 17:25:36,999 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-11-25 17:25:37,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 41 transitions, 211 flow [2022-11-25 17:25:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2022-11-25 17:25:37,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46812957157784746 [2022-11-25 17:25:37,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2022-11-25 17:25:37,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2022-11-25 17:25:37,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:37,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2022-11-25 17:25:37,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,007 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,007 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 139 flow. Second operand 3 states and 448 transitions. [2022-11-25 17:25:37,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 41 transitions, 211 flow [2022-11-25 17:25:37,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:37,009 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 136 flow [2022-11-25 17:25:37,009 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2022-11-25 17:25:37,010 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2022-11-25 17:25:37,010 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 136 flow [2022-11-25 17:25:37,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:37,011 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:25:37,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:37,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:37,223 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:37,223 INFO L85 PathProgramCache]: Analyzing trace with hash 654015465, now seen corresponding path program 1 times [2022-11-25 17:25:37,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:37,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578262409] [2022-11-25 17:25:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:37,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:37,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:37,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:25:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:25:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:37,422 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:25:37,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:25:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:37,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:37,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:37,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578262409] [2022-11-25 17:25:37,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578262409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:37,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:37,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:25:37,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330610620] [2022-11-25 17:25:37,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:37,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:25:37,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:25:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:25:37,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 319 [2022-11-25 17:25:37,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:37,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:37,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 319 [2022-11-25 17:25:37,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:38,044 INFO L130 PetriNetUnfolder]: 1107/1821 cut-off events. [2022-11-25 17:25:38,044 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-25 17:25:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 1821 events. 1107/1821 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 10883 event pairs, 1041 based on Foata normal form. 0/1041 useless extension candidates. Maximal degree in co-relation 3684. Up to 1748 conditions per place. [2022-11-25 17:25:38,056 INFO L137 encePairwiseOnDemand]: 314/319 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2022-11-25 17:25:38,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 200 flow [2022-11-25 17:25:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:25:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:25:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2022-11-25 17:25:38,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.445141065830721 [2022-11-25 17:25:38,059 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2022-11-25 17:25:38,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2022-11-25 17:25:38,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:38,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2022-11-25 17:25:38,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,064 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 136 flow. Second operand 4 states and 568 transitions. [2022-11-25 17:25:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 200 flow [2022-11-25 17:25:38,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:38,066 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 137 flow [2022-11-25 17:25:38,066 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2022-11-25 17:25:38,067 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2022-11-25 17:25:38,067 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 137 flow [2022-11-25 17:25:38,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:38,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:25:38,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:38,279 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash 654015466, now seen corresponding path program 1 times [2022-11-25 17:25:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:38,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510635548] [2022-11-25 17:25:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:38,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:38,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:38,286 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:38,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:25:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:25:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:38,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:38,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:38,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510635548] [2022-11-25 17:25:38,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510635548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:38,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:38,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:38,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113129000] [2022-11-25 17:25:38,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:38,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:38,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:38,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 319 [2022-11-25 17:25:38,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:38,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 319 [2022-11-25 17:25:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:38,917 INFO L130 PetriNetUnfolder]: 1518/2490 cut-off events. [2022-11-25 17:25:38,917 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-11-25 17:25:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4952 conditions, 2490 events. 1518/2490 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 14598 event pairs, 555 based on Foata normal form. 0/1422 useless extension candidates. Maximal degree in co-relation 4934. Up to 1567 conditions per place. [2022-11-25 17:25:38,932 INFO L137 encePairwiseOnDemand]: 315/319 looper letters, 52 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2022-11-25 17:25:38,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 287 flow [2022-11-25 17:25:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-11-25 17:25:38,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2022-11-25 17:25:38,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-11-25 17:25:38,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-11-25 17:25:38,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:38,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-11-25 17:25:38,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,939 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 137 flow. Second operand 3 states and 473 transitions. [2022-11-25 17:25:38,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 287 flow [2022-11-25 17:25:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:25:38,942 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 146 flow [2022-11-25 17:25:38,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2022-11-25 17:25:38,942 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2022-11-25 17:25:38,943 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 146 flow [2022-11-25 17:25:38,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:38,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:38,943 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:25:38,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-25 17:25:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:39,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1205397658, now seen corresponding path program 2 times [2022-11-25 17:25:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:39,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150661597] [2022-11-25 17:25:39,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:25:39,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:39,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:39,156 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:39,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:25:39,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:25:39,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:39,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:25:39,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:39,406 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:39,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:39,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:40,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150661597] [2022-11-25 17:25:40,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150661597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:40,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:40,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:25:40,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150260347] [2022-11-25 17:25:40,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:40,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:25:40,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:40,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:25:40,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:25:44,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 319 [2022-11-25 17:25:44,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 146 flow. Second operand has 12 states, 12 states have (on average 135.0) internal successors, (1620), 12 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:44,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:44,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 319 [2022-11-25 17:25:44,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:49,910 INFO L130 PetriNetUnfolder]: 5052/8184 cut-off events. [2022-11-25 17:25:49,911 INFO L131 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2022-11-25 17:25:49,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18343 conditions, 8184 events. 5052/8184 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55591 event pairs, 3730 based on Foata normal form. 6/5822 useless extension candidates. Maximal degree in co-relation 18324. Up to 1841 conditions per place. [2022-11-25 17:25:49,957 INFO L137 encePairwiseOnDemand]: 315/319 looper letters, 272 selfloop transitions, 12 changer transitions 0/287 dead transitions. [2022-11-25 17:25:49,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 287 transitions, 1409 flow [2022-11-25 17:25:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:25:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:25:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1888 transitions. [2022-11-25 17:25:49,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49320794148380354 [2022-11-25 17:25:49,964 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1888 transitions. [2022-11-25 17:25:49,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1888 transitions. [2022-11-25 17:25:49,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:49,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1888 transitions. [2022-11-25 17:25:49,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.33333333333334) internal successors, (1888), 12 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 319.0) internal successors, (4147), 13 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,976 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 319.0) internal successors, (4147), 13 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,977 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 146 flow. Second operand 12 states and 1888 transitions. [2022-11-25 17:25:49,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 287 transitions, 1409 flow [2022-11-25 17:25:49,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 287 transitions, 1398 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:49,984 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 243 flow [2022-11-25 17:25:49,984 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=243, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2022-11-25 17:25:49,985 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2022-11-25 17:25:49,985 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 243 flow [2022-11-25 17:25:49,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 135.0) internal successors, (1620), 12 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:49,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:49,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:25:50,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:50,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:50,198 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1200191304, now seen corresponding path program 1 times [2022-11-25 17:25:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580646686] [2022-11-25 17:25:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:50,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:50,201 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:50,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:25:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:25:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:50,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:25:50,419 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 17:25:50,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 17:25:50,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 252 [2022-11-25 17:25:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:50,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:50,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:50,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580646686] [2022-11-25 17:25:50,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580646686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:50,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:50,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:50,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679913935] [2022-11-25 17:25:50,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:50,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:50,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:50,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:50,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2022-11-25 17:25:50,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:50,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:50,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2022-11-25 17:25:50,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:51,654 INFO L130 PetriNetUnfolder]: 4482/7254 cut-off events. [2022-11-25 17:25:51,654 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-11-25 17:25:51,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16162 conditions, 7254 events. 4482/7254 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48546 event pairs, 3320 based on Foata normal form. 0/5314 useless extension candidates. Maximal degree in co-relation 16135. Up to 6884 conditions per place. [2022-11-25 17:25:51,699 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 40 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 17:25:51,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 44 transitions, 321 flow [2022-11-25 17:25:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2022-11-25 17:25:51,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4660397074190178 [2022-11-25 17:25:51,702 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2022-11-25 17:25:51,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2022-11-25 17:25:51,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:51,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2022-11-25 17:25:51,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:51,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:51,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:51,708 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 243 flow. Second operand 3 states and 446 transitions. [2022-11-25 17:25:51,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 44 transitions, 321 flow [2022-11-25 17:25:51,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 44 transitions, 296 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-25 17:25:51,711 INFO L231 Difference]: Finished difference. Result has 65 places, 44 transitions, 216 flow [2022-11-25 17:25:51,712 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=65, PETRI_TRANSITIONS=44} [2022-11-25 17:25:51,712 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2022-11-25 17:25:51,712 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 44 transitions, 216 flow [2022-11-25 17:25:51,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:51,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:51,713 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:25:51,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-25 17:25:51,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:51,926 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:51,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1200191305, now seen corresponding path program 1 times [2022-11-25 17:25:51,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:51,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566596507] [2022-11-25 17:25:51,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:51,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:51,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:51,929 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:51,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:25:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:52,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:25:52,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:52,137 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-25 17:25:52,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-25 17:25:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:52,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:52,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566596507] [2022-11-25 17:25:52,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566596507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:52,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:52,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:25:52,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461173835] [2022-11-25 17:25:52,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:52,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:52,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:52,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:52,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 319 [2022-11-25 17:25:52,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 44 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:52,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:52,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 319 [2022-11-25 17:25:52,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:53,130 INFO L130 PetriNetUnfolder]: 3912/6324 cut-off events. [2022-11-25 17:25:53,130 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2022-11-25 17:25:53,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14125 conditions, 6324 events. 3912/6324 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 41284 event pairs, 2910 based on Foata normal form. 0/4884 useless extension candidates. Maximal degree in co-relation 14097. Up to 6014 conditions per place. [2022-11-25 17:25:53,164 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 17:25:53,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 42 transitions, 290 flow [2022-11-25 17:25:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2022-11-25 17:25:53,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45141065830721006 [2022-11-25 17:25:53,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2022-11-25 17:25:53,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2022-11-25 17:25:53,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:53,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2022-11-25 17:25:53,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:53,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:53,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:53,171 INFO L175 Difference]: Start difference. First operand has 65 places, 44 transitions, 216 flow. Second operand 3 states and 432 transitions. [2022-11-25 17:25:53,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 42 transitions, 290 flow [2022-11-25 17:25:53,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 42 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:53,174 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 213 flow [2022-11-25 17:25:53,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2022-11-25 17:25:53,175 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2022-11-25 17:25:53,176 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 213 flow [2022-11-25 17:25:53,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:53,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:53,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:53,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:53,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:53,388 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1448774184, now seen corresponding path program 1 times [2022-11-25 17:25:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989882752] [2022-11-25 17:25:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:53,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:53,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:25:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:25:53,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:53,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:53,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:53,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989882752] [2022-11-25 17:25:53,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989882752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:53,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:53,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:25:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942878365] [2022-11-25 17:25:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:53,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:25:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:25:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:25:53,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 319 [2022-11-25 17:25:53,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 42 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:53,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:53,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 319 [2022-11-25 17:25:53,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:54,350 INFO L130 PetriNetUnfolder]: 3672/5904 cut-off events. [2022-11-25 17:25:54,350 INFO L131 PetriNetUnfolder]: For 778/778 co-relation queries the response was YES. [2022-11-25 17:25:54,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13286 conditions, 5904 events. 3672/5904 cut-off events. For 778/778 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38944 event pairs, 1930 based on Foata normal form. 0/4664 useless extension candidates. Maximal degree in co-relation 13257. Up to 4335 conditions per place. [2022-11-25 17:25:54,396 INFO L137 encePairwiseOnDemand]: 316/319 looper letters, 50 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-11-25 17:25:54,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 347 flow [2022-11-25 17:25:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:25:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:25:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2022-11-25 17:25:54,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48693834900731453 [2022-11-25 17:25:54,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2022-11-25 17:25:54,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2022-11-25 17:25:54,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:54,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2022-11-25 17:25:54,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:54,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:54,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:54,404 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 213 flow. Second operand 3 states and 466 transitions. [2022-11-25 17:25:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 347 flow [2022-11-25 17:25:54,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:25:54,407 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 220 flow [2022-11-25 17:25:54,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2022-11-25 17:25:54,408 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2022-11-25 17:25:54,408 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 220 flow [2022-11-25 17:25:54,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:54,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:54,409 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:54,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:54,622 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1448774185, now seen corresponding path program 1 times [2022-11-25 17:25:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:54,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321270935] [2022-11-25 17:25:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:54,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:54,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:54,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:54,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:25:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:25:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:54,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:54,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:54,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321270935] [2022-11-25 17:25:54,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321270935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:54,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:54,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:25:54,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166880321] [2022-11-25 17:25:54,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:54,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:25:54,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:25:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:25:54,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2022-11-25 17:25:54,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:54,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:54,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2022-11-25 17:25:54,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:55,739 INFO L130 PetriNetUnfolder]: 3366/5454 cut-off events. [2022-11-25 17:25:55,739 INFO L131 PetriNetUnfolder]: For 1724/1724 co-relation queries the response was YES. [2022-11-25 17:25:55,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12939 conditions, 5454 events. 3366/5454 cut-off events. For 1724/1724 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 34774 event pairs, 2464 based on Foata normal form. 16/4534 useless extension candidates. Maximal degree in co-relation 12909. Up to 5054 conditions per place. [2022-11-25 17:25:55,762 INFO L137 encePairwiseOnDemand]: 314/319 looper letters, 53 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2022-11-25 17:25:55,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 59 transitions, 380 flow [2022-11-25 17:25:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:25:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:25:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2022-11-25 17:25:55,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47100313479623823 [2022-11-25 17:25:55,765 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2022-11-25 17:25:55,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2022-11-25 17:25:55,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:55,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2022-11-25 17:25:55,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:55,771 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:55,771 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 220 flow. Second operand 4 states and 601 transitions. [2022-11-25 17:25:55,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 59 transitions, 380 flow [2022-11-25 17:25:55,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 59 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:25:55,784 INFO L231 Difference]: Finished difference. Result has 69 places, 43 transitions, 239 flow [2022-11-25 17:25:55,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=69, PETRI_TRANSITIONS=43} [2022-11-25 17:25:55,785 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2022-11-25 17:25:55,786 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 43 transitions, 239 flow [2022-11-25 17:25:55,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:25:55,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:55,786 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:55,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:55,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:55,999 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:25:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1415496481, now seen corresponding path program 1 times [2022-11-25 17:25:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:25:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162053449] [2022-11-25 17:25:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:56,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:25:56,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:25:56,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:25:56,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:25:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:56,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:25:56,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:56,250 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:25:56,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:25:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:57,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:25:57,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162053449] [2022-11-25 17:25:57,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162053449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:57,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:57,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 17:25:57,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998718171] [2022-11-25 17:25:57,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:57,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:25:57,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:25:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:25:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:26:03,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 319 [2022-11-25 17:26:03,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 43 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:03,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:03,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 319 [2022-11-25 17:26:03,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:07,698 INFO L130 PetriNetUnfolder]: 2790/4590 cut-off events. [2022-11-25 17:26:07,699 INFO L131 PetriNetUnfolder]: For 1634/1634 co-relation queries the response was YES. [2022-11-25 17:26:07,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11165 conditions, 4590 events. 2790/4590 cut-off events. For 1634/1634 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28898 event pairs, 2050 based on Foata normal form. 172/4466 useless extension candidates. Maximal degree in co-relation 11133. Up to 3361 conditions per place. [2022-11-25 17:26:07,720 INFO L137 encePairwiseOnDemand]: 312/319 looper letters, 83 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2022-11-25 17:26:07,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 588 flow [2022-11-25 17:26:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:26:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:26:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1381 transitions. [2022-11-25 17:26:07,725 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4329153605015674 [2022-11-25 17:26:07,725 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1381 transitions. [2022-11-25 17:26:07,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1381 transitions. [2022-11-25 17:26:07,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:07,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1381 transitions. [2022-11-25 17:26:07,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 138.1) internal successors, (1381), 10 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:07,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:07,735 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:07,735 INFO L175 Difference]: Start difference. First operand has 69 places, 43 transitions, 239 flow. Second operand 10 states and 1381 transitions. [2022-11-25 17:26:07,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 588 flow [2022-11-25 17:26:07,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 578 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 17:26:07,743 INFO L231 Difference]: Finished difference. Result has 78 places, 44 transitions, 277 flow [2022-11-25 17:26:07,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=277, PETRI_PLACES=78, PETRI_TRANSITIONS=44} [2022-11-25 17:26:07,744 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2022-11-25 17:26:07,744 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 44 transitions, 277 flow [2022-11-25 17:26:07,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:07,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:07,745 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:07,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:07,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:07,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:26:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash -769849303, now seen corresponding path program 2 times [2022-11-25 17:26:07,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:07,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725546187] [2022-11-25 17:26:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:26:07,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:07,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:07,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 17:26:08,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:26:08,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:26:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:08,242 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:26:08,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:26:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:26:08,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:26:08,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725546187] [2022-11-25 17:26:08,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725546187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:26:08,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:26:08,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:26:08,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309059778] [2022-11-25 17:26:08,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:08,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:26:08,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:08,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:26:08,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:26:08,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 319 [2022-11-25 17:26:08,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 44 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:08,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:08,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 319 [2022-11-25 17:26:08,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:09,223 INFO L130 PetriNetUnfolder]: 1638/2862 cut-off events. [2022-11-25 17:26:09,223 INFO L131 PetriNetUnfolder]: For 3822/3822 co-relation queries the response was YES. [2022-11-25 17:26:09,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 2862 events. 1638/2862 cut-off events. For 3822/3822 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17137 event pairs, 1222 based on Foata normal form. 456/3246 useless extension candidates. Maximal degree in co-relation 6789. Up to 2677 conditions per place. [2022-11-25 17:26:09,234 INFO L137 encePairwiseOnDemand]: 314/319 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-11-25 17:26:09,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 41 transitions, 329 flow [2022-11-25 17:26:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:26:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:26:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2022-11-25 17:26:09,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4427899686520376 [2022-11-25 17:26:09,238 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2022-11-25 17:26:09,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2022-11-25 17:26:09,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:09,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2022-11-25 17:26:09,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:09,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:09,243 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:09,243 INFO L175 Difference]: Start difference. First operand has 78 places, 44 transitions, 277 flow. Second operand 4 states and 565 transitions. [2022-11-25 17:26:09,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 41 transitions, 329 flow [2022-11-25 17:26:09,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 41 transitions, 274 flow, removed 11 selfloop flow, removed 12 redundant places. [2022-11-25 17:26:09,249 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 212 flow [2022-11-25 17:26:09,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2022-11-25 17:26:09,249 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2022-11-25 17:26:09,250 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 212 flow [2022-11-25 17:26:09,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:09,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:09,250 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 17:26:09,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:09,463 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:26:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1196251750, now seen corresponding path program 3 times [2022-11-25 17:26:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:09,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337480996] [2022-11-25 17:26:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:26:09,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:09,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:09,464 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:09,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 17:26:09,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:26:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:26:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:09,830 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:26:09,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:26:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:10,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:13,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:13,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337480996] [2022-11-25 17:26:13,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337480996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:13,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:26:13,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 17:26:13,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037972349] [2022-11-25 17:26:13,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:26:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:13,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:26:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:26:32,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 319 [2022-11-25 17:26:32,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 212 flow. Second operand has 24 states, 24 states have (on average 135.0) internal successors, (3240), 24 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:32,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:32,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 319 [2022-11-25 17:26:32,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:55,079 INFO L130 PetriNetUnfolder]: 3738/6510 cut-off events. [2022-11-25 17:26:55,079 INFO L131 PetriNetUnfolder]: For 2009/2009 co-relation queries the response was YES. [2022-11-25 17:26:55,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15115 conditions, 6510 events. 3738/6510 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 41371 event pairs, 2770 based on Foata normal form. 12/6514 useless extension candidates. Maximal degree in co-relation 15088. Up to 1303 conditions per place. [2022-11-25 17:26:55,105 INFO L137 encePairwiseOnDemand]: 315/319 looper letters, 439 selfloop transitions, 24 changer transitions 0/466 dead transitions. [2022-11-25 17:26:55,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 466 transitions, 2503 flow [2022-11-25 17:26:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:26:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 17:26:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3670 transitions. [2022-11-25 17:26:55,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47936259143155696 [2022-11-25 17:26:55,117 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3670 transitions. [2022-11-25 17:26:55,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3670 transitions. [2022-11-25 17:26:55,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:55,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3670 transitions. [2022-11-25 17:26:55,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 152.91666666666666) internal successors, (3670), 24 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:55,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 319.0) internal successors, (7975), 25 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:55,142 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 319.0) internal successors, (7975), 25 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:55,142 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 212 flow. Second operand 24 states and 3670 transitions. [2022-11-25 17:26:55,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 466 transitions, 2503 flow [2022-11-25 17:26:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 466 transitions, 2478 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:26:55,155 INFO L231 Difference]: Finished difference. Result has 100 places, 54 transitions, 391 flow [2022-11-25 17:26:55,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=391, PETRI_PLACES=100, PETRI_TRANSITIONS=54} [2022-11-25 17:26:55,155 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 48 predicate places. [2022-11-25 17:26:55,156 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 54 transitions, 391 flow [2022-11-25 17:26:55,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 135.0) internal successors, (3240), 24 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:55,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:55,157 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:55,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:55,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:55,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:26:55,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash -942219918, now seen corresponding path program 1 times [2022-11-25 17:26:55,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:55,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161509074] [2022-11-25 17:26:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:55,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:55,373 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:55,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 17:26:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:26:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:55,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:26:55,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:55,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161509074] [2022-11-25 17:26:55,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161509074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:26:55,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:26:55,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:26:55,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545019523] [2022-11-25 17:26:55,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:26:55,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:26:55,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:26:55,518 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2022-11-25 17:26:55,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 54 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:55,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:55,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2022-11-25 17:26:55,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:56,564 INFO L130 PetriNetUnfolder]: 3608/6257 cut-off events. [2022-11-25 17:26:56,565 INFO L131 PetriNetUnfolder]: For 1744/1744 co-relation queries the response was YES. [2022-11-25 17:26:56,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15064 conditions, 6257 events. 3608/6257 cut-off events. For 1744/1744 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 39163 event pairs, 258 based on Foata normal form. 692/6907 useless extension candidates. Maximal degree in co-relation 15024. Up to 2595 conditions per place. [2022-11-25 17:26:56,599 INFO L137 encePairwiseOnDemand]: 314/319 looper letters, 73 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2022-11-25 17:26:56,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 79 transitions, 624 flow [2022-11-25 17:26:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:26:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:26:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 743 transitions. [2022-11-25 17:26:56,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4658307210031348 [2022-11-25 17:26:56,603 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 743 transitions. [2022-11-25 17:26:56,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 743 transitions. [2022-11-25 17:26:56,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:56,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 743 transitions. [2022-11-25 17:26:56,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.6) internal successors, (743), 5 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:56,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 319.0) internal successors, (1914), 6 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:56,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 319.0) internal successors, (1914), 6 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:56,608 INFO L175 Difference]: Start difference. First operand has 100 places, 54 transitions, 391 flow. Second operand 5 states and 743 transitions. [2022-11-25 17:26:56,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 79 transitions, 624 flow [2022-11-25 17:26:56,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 79 transitions, 573 flow, removed 13 selfloop flow, removed 11 redundant places. [2022-11-25 17:26:56,618 INFO L231 Difference]: Finished difference. Result has 96 places, 57 transitions, 371 flow [2022-11-25 17:26:56,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=96, PETRI_TRANSITIONS=57} [2022-11-25 17:26:56,619 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2022-11-25 17:26:56,619 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 57 transitions, 371 flow [2022-11-25 17:26:56,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:56,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:56,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:56,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:56,832 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:26:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1545653170, now seen corresponding path program 2 times [2022-11-25 17:26:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232162009] [2022-11-25 17:26:56,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:26:56,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:56,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:56,834 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:56,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 17:26:56,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:26:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:26:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:56,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:26:56,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232162009] [2022-11-25 17:26:56,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232162009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:26:56,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:26:56,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:26:56,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315986503] [2022-11-25 17:26:56,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:56,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:26:56,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:26:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:26:56,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2022-11-25 17:26:56,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 57 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:56,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:56,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2022-11-25 17:26:56,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:58,019 INFO L130 PetriNetUnfolder]: 3506/6502 cut-off events. [2022-11-25 17:26:58,019 INFO L131 PetriNetUnfolder]: For 4845/5173 co-relation queries the response was YES. [2022-11-25 17:26:58,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17529 conditions, 6502 events. 3506/6502 cut-off events. For 4845/5173 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 43104 event pairs, 448 based on Foata normal form. 980/7320 useless extension candidates. Maximal degree in co-relation 17485. Up to 3166 conditions per place. [2022-11-25 17:26:58,055 INFO L137 encePairwiseOnDemand]: 314/319 looper letters, 65 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-11-25 17:26:58,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 76 transitions, 581 flow [2022-11-25 17:26:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:26:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:26:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 736 transitions. [2022-11-25 17:26:58,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4614420062695925 [2022-11-25 17:26:58,059 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 736 transitions. [2022-11-25 17:26:58,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 736 transitions. [2022-11-25 17:26:58,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:58,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 736 transitions. [2022-11-25 17:26:58,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:58,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 319.0) internal successors, (1914), 6 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:58,065 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 319.0) internal successors, (1914), 6 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:58,065 INFO L175 Difference]: Start difference. First operand has 96 places, 57 transitions, 371 flow. Second operand 5 states and 736 transitions. [2022-11-25 17:26:58,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 76 transitions, 581 flow [2022-11-25 17:26:58,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 76 transitions, 577 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:26:58,088 INFO L231 Difference]: Finished difference. Result has 102 places, 61 transitions, 413 flow [2022-11-25 17:26:58,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=102, PETRI_TRANSITIONS=61} [2022-11-25 17:26:58,089 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2022-11-25 17:26:58,089 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 61 transitions, 413 flow [2022-11-25 17:26:58,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:58,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:58,090 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:58,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:58,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:58,303 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:26:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash -182657758, now seen corresponding path program 3 times [2022-11-25 17:26:58,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:26:58,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846675907] [2022-11-25 17:26:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:26:58,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:26:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:26:58,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:26:58,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 17:26:58,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:26:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:58,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:26:58,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:58,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:26:58,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:26:58,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846675907] [2022-11-25 17:26:58,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846675907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:26:58,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:26:58,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:26:58,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28616485] [2022-11-25 17:26:58,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:26:58,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:26:58,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:26:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:26:58,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:26:58,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 319 [2022-11-25 17:26:58,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 61 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:58,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:58,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 319 [2022-11-25 17:26:58,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:59,898 INFO L130 PetriNetUnfolder]: 4414/7923 cut-off events. [2022-11-25 17:26:59,898 INFO L131 PetriNetUnfolder]: For 8636/8776 co-relation queries the response was YES. [2022-11-25 17:26:59,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24717 conditions, 7923 events. 4414/7923 cut-off events. For 8636/8776 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 53422 event pairs, 327 based on Foata normal form. 528/8311 useless extension candidates. Maximal degree in co-relation 24669. Up to 2641 conditions per place. [2022-11-25 17:26:59,944 INFO L137 encePairwiseOnDemand]: 313/319 looper letters, 69 selfloop transitions, 5 changer transitions 12/88 dead transitions. [2022-11-25 17:26:59,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 88 transitions, 695 flow [2022-11-25 17:26:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:26:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:26:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 880 transitions. [2022-11-25 17:26:59,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2022-11-25 17:26:59,946 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 880 transitions. [2022-11-25 17:26:59,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 880 transitions. [2022-11-25 17:26:59,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:59,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 880 transitions. [2022-11-25 17:26:59,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.66666666666666) internal successors, (880), 6 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:59,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:59,952 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:59,952 INFO L175 Difference]: Start difference. First operand has 102 places, 61 transitions, 413 flow. Second operand 6 states and 880 transitions. [2022-11-25 17:26:59,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 88 transitions, 695 flow [2022-11-25 17:26:59,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 88 transitions, 691 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:26:59,977 INFO L231 Difference]: Finished difference. Result has 108 places, 56 transitions, 397 flow [2022-11-25 17:26:59,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=108, PETRI_TRANSITIONS=56} [2022-11-25 17:26:59,978 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 56 predicate places. [2022-11-25 17:26:59,978 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 56 transitions, 397 flow [2022-11-25 17:26:59,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:59,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:59,979 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2022-11-25 17:26:59,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:00,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:27:00,190 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:27:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:00,191 INFO L85 PathProgramCache]: Analyzing trace with hash -196140954, now seen corresponding path program 4 times [2022-11-25 17:27:00,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:27:00,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927360480] [2022-11-25 17:27:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:27:00,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:27:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:27:00,192 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:27:00,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 17:27:00,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:27:00,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:27:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:00,564 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:27:00,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:27:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:02,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:14,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:27:14,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927360480] [2022-11-25 17:27:14,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927360480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:14,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:27:14,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-25 17:27:14,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083899165] [2022-11-25 17:27:14,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 17:27:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:27:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 17:27:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 17:28:42,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 319 [2022-11-25 17:28:42,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 56 transitions, 397 flow. Second operand has 48 states, 48 states have (on average 135.0) internal successors, (6480), 48 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:28:42,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:42,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 319 [2022-11-25 17:28:42,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:14,510 WARN L233 SmtUtils]: Spent 19.86s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:29:36,251 WARN L233 SmtUtils]: Spent 19.44s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:29:59,569 WARN L233 SmtUtils]: Spent 21.06s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:14,217 WARN L233 SmtUtils]: Spent 12.29s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:26,018 WARN L233 SmtUtils]: Spent 9.59s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:37,026 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:47,305 WARN L233 SmtUtils]: Spent 7.93s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:30:58,074 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:31:07,772 WARN L233 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:32:02,226 INFO L130 PetriNetUnfolder]: 3557/7250 cut-off events. [2022-11-25 17:32:02,226 INFO L131 PetriNetUnfolder]: For 22451/23215 co-relation queries the response was YES. [2022-11-25 17:32:02,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24639 conditions, 7250 events. 3557/7250 cut-off events. For 22451/23215 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 47689 event pairs, 1665 based on Foata normal form. 788/7857 useless extension candidates. Maximal degree in co-relation 24588. Up to 2611 conditions per place. [2022-11-25 17:32:02,274 INFO L137 encePairwiseOnDemand]: 315/319 looper letters, 947 selfloop transitions, 48 changer transitions 0/1000 dead transitions. [2022-11-25 17:32:02,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1000 transitions, 6916 flow [2022-11-25 17:32:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:32:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:32:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7361 transitions. [2022-11-25 17:32:02,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48073406478578895 [2022-11-25 17:32:02,288 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7361 transitions. [2022-11-25 17:32:02,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7361 transitions. [2022-11-25 17:32:02,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:02,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7361 transitions. [2022-11-25 17:32:02,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 153.35416666666666) internal successors, (7361), 48 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 319.0) internal successors, (15631), 49 states have internal predecessors, (15631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,321 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 319.0) internal successors, (15631), 49 states have internal predecessors, (15631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,322 INFO L175 Difference]: Start difference. First operand has 108 places, 56 transitions, 397 flow. Second operand 48 states and 7361 transitions. [2022-11-25 17:32:02,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1000 transitions, 6916 flow [2022-11-25 17:32:02,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 1000 transitions, 6364 flow, removed 90 selfloop flow, removed 11 redundant places. [2022-11-25 17:32:02,372 INFO L231 Difference]: Finished difference. Result has 167 places, 81 transitions, 731 flow [2022-11-25 17:32:02,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=731, PETRI_PLACES=167, PETRI_TRANSITIONS=81} [2022-11-25 17:32:02,373 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2022-11-25 17:32:02,373 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 81 transitions, 731 flow [2022-11-25 17:32:02,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 135.0) internal successors, (6480), 48 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:02,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:02,375 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:02,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:02,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:02,594 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1045488745, now seen corresponding path program 1 times [2022-11-25 17:32:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:02,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732876108] [2022-11-25 17:32:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:02,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:02,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:02,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:02,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 17:32:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:32:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:02,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:32:02,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 17:32:03,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:03,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-25 17:32:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:03,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:03,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 162 [2022-11-25 17:32:03,611 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 17:32:03,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 256 treesize of output 164 [2022-11-25 17:32:03,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2022-11-25 17:32:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:08,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732876108] [2022-11-25 17:32:08,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732876108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:08,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:08,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 17:32:08,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489268064] [2022-11-25 17:32:08,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:08,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:32:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:32:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:32:10,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 319 [2022-11-25 17:32:10,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 81 transitions, 731 flow. Second operand has 14 states, 14 states have (on average 125.64285714285714) internal successors, (1759), 14 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:10,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:10,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 319 [2022-11-25 17:32:10,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:16,688 INFO L130 PetriNetUnfolder]: 10217/18905 cut-off events. [2022-11-25 17:32:16,688 INFO L131 PetriNetUnfolder]: For 26679/28344 co-relation queries the response was YES. [2022-11-25 17:32:16,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59159 conditions, 18905 events. 10217/18905 cut-off events. For 26679/28344 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 136337 event pairs, 720 based on Foata normal form. 2385/21290 useless extension candidates. Maximal degree in co-relation 59089. Up to 6526 conditions per place. [2022-11-25 17:32:16,907 INFO L137 encePairwiseOnDemand]: 311/319 looper letters, 104 selfloop transitions, 11 changer transitions 9/127 dead transitions. [2022-11-25 17:32:16,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 127 transitions, 1153 flow [2022-11-25 17:32:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:32:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:32:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1302 transitions. [2022-11-25 17:32:16,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40815047021943573 [2022-11-25 17:32:16,910 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1302 transitions. [2022-11-25 17:32:16,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1302 transitions. [2022-11-25 17:32:16,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:16,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1302 transitions. [2022-11-25 17:32:16,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.2) internal successors, (1302), 10 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:16,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:16,915 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:16,915 INFO L175 Difference]: Start difference. First operand has 167 places, 81 transitions, 731 flow. Second operand 10 states and 1302 transitions. [2022-11-25 17:32:16,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 127 transitions, 1153 flow [2022-11-25 17:32:16,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 127 transitions, 1057 flow, removed 25 selfloop flow, removed 22 redundant places. [2022-11-25 17:32:16,950 INFO L231 Difference]: Finished difference. Result has 159 places, 86 transitions, 706 flow [2022-11-25 17:32:16,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=706, PETRI_PLACES=159, PETRI_TRANSITIONS=86} [2022-11-25 17:32:16,951 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2022-11-25 17:32:16,952 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 86 transitions, 706 flow [2022-11-25 17:32:16,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.64285714285714) internal successors, (1759), 14 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:16,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:16,953 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:16,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:17,167 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1829009885, now seen corresponding path program 2 times [2022-11-25 17:32:17,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:17,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028777624] [2022-11-25 17:32:17,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:32:17,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:17,169 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:17,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 17:32:17,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:32:17,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:32:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:17,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 17:32:17,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:32:17,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:32:17,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 17:32:17,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-25 17:32:18,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:18,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-25 17:32:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:18,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:18,463 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset (_ bv3 32) .cse6)) (.cse2 (bvadd c_~queue~0.offset (_ bv2 32) .cse6)) (.cse3 (bvadd c_~queue~0.offset .cse6 (_ bv1 32))) (.cse4 (bvadd c_~queue~0.offset .cse6))) (and (forall ((v_ArrVal_786 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (_ bv0 32) (bvadd c_~sum~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_786) c_~queue~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4)))))) (forall ((v_ArrVal_786 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsle (bvadd c_~sum~0 (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_786) c_~queue~0.base))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4)))) (_ bv1 32)))))) is different from false [2022-11-25 17:32:18,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 162 [2022-11-25 17:32:18,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 158 [2022-11-25 17:32:20,411 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 17:32:20,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 482 treesize of output 425 [2022-11-25 17:32:20,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:20,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:20,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 218 treesize of output 185 [2022-11-25 17:32:20,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 158 [2022-11-25 17:32:26,378 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-25 17:32:26,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 482 treesize of output 425 [2022-11-25 17:32:26,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:32:26,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:32:26,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 218 treesize of output 185 [2022-11-25 17:32:26,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 158 [2022-11-25 17:32:40,879 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 547 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:32:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:32:41,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:41,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028777624] [2022-11-25 17:32:41,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028777624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:41,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:41,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-25 17:32:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302397074] [2022-11-25 17:32:41,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:41,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:32:41,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:32:41,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=285, Unknown=2, NotChecked=34, Total=380 [2022-11-25 17:32:43,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 319 [2022-11-25 17:32:43,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 86 transitions, 706 flow. Second operand has 20 states, 20 states have (on average 93.0) internal successors, (1860), 20 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:43,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:43,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 319 [2022-11-25 17:32:43,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:46,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:49,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:59,371 INFO L130 PetriNetUnfolder]: 16371/26847 cut-off events. [2022-11-25 17:32:59,371 INFO L131 PetriNetUnfolder]: For 63380/63380 co-relation queries the response was YES. [2022-11-25 17:32:59,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105096 conditions, 26847 events. 16371/26847 cut-off events. For 63380/63380 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 171015 event pairs, 748 based on Foata normal form. 880/27727 useless extension candidates. Maximal degree in co-relation 105020. Up to 8537 conditions per place. [2022-11-25 17:32:59,753 INFO L137 encePairwiseOnDemand]: 307/319 looper letters, 129 selfloop transitions, 28 changer transitions 11/168 dead transitions. [2022-11-25 17:32:59,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 168 transitions, 1470 flow [2022-11-25 17:32:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:32:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:32:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1558 transitions. [2022-11-25 17:32:59,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30525078369905956 [2022-11-25 17:32:59,757 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1558 transitions. [2022-11-25 17:32:59,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1558 transitions. [2022-11-25 17:32:59,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:59,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1558 transitions. [2022-11-25 17:32:59,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 97.375) internal successors, (1558), 16 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:59,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 319.0) internal successors, (5423), 17 states have internal predecessors, (5423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:59,765 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 319.0) internal successors, (5423), 17 states have internal predecessors, (5423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:59,765 INFO L175 Difference]: Start difference. First operand has 159 places, 86 transitions, 706 flow. Second operand 16 states and 1558 transitions. [2022-11-25 17:32:59,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 168 transitions, 1470 flow [2022-11-25 17:33:00,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 168 transitions, 1423 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-25 17:33:00,997 INFO L231 Difference]: Finished difference. Result has 175 places, 105 transitions, 897 flow [2022-11-25 17:33:00,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=897, PETRI_PLACES=175, PETRI_TRANSITIONS=105} [2022-11-25 17:33:00,998 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 123 predicate places. [2022-11-25 17:33:00,998 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 105 transitions, 897 flow [2022-11-25 17:33:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 93.0) internal successors, (1860), 20 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:00,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:00,998 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:01,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:01,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:01,199 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash -80988033, now seen corresponding path program 3 times [2022-11-25 17:33:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071327274] [2022-11-25 17:33:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:33:01,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:01,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:01,201 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:01,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 17:33:01,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:33:01,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:33:01,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:02,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:02,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071327274] [2022-11-25 17:33:02,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071327274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:02,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:33:02,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-25 17:33:02,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570684889] [2022-11-25 17:33:02,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:02,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:33:02,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:33:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:33:03,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 319 [2022-11-25 17:33:03,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 105 transitions, 897 flow. Second operand has 12 states, 12 states have (on average 135.91666666666666) internal successors, (1631), 12 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:03,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:03,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 319 [2022-11-25 17:33:03,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:07,981 INFO L130 PetriNetUnfolder]: 7270/14121 cut-off events. [2022-11-25 17:33:07,982 INFO L131 PetriNetUnfolder]: For 72297/73040 co-relation queries the response was YES. [2022-11-25 17:33:08,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68215 conditions, 14121 events. 7270/14121 cut-off events. For 72297/73040 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 101218 event pairs, 2550 based on Foata normal form. 764/14625 useless extension candidates. Maximal degree in co-relation 68133. Up to 10494 conditions per place. [2022-11-25 17:33:08,189 INFO L137 encePairwiseOnDemand]: 313/319 looper letters, 81 selfloop transitions, 10 changer transitions 32/136 dead transitions. [2022-11-25 17:33:08,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 136 transitions, 1353 flow [2022-11-25 17:33:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:33:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:33:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1378 transitions. [2022-11-25 17:33:08,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43197492163009404 [2022-11-25 17:33:08,192 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1378 transitions. [2022-11-25 17:33:08,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1378 transitions. [2022-11-25 17:33:08,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:08,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1378 transitions. [2022-11-25 17:33:08,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 137.8) internal successors, (1378), 10 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:08,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:08,196 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:08,197 INFO L175 Difference]: Start difference. First operand has 175 places, 105 transitions, 897 flow. Second operand 10 states and 1378 transitions. [2022-11-25 17:33:08,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 136 transitions, 1353 flow [2022-11-25 17:33:09,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 136 transitions, 1303 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-11-25 17:33:09,234 INFO L231 Difference]: Finished difference. Result has 183 places, 104 transitions, 897 flow [2022-11-25 17:33:09,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=897, PETRI_PLACES=183, PETRI_TRANSITIONS=104} [2022-11-25 17:33:09,235 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 131 predicate places. [2022-11-25 17:33:09,236 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 104 transitions, 897 flow [2022-11-25 17:33:09,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 135.91666666666666) internal successors, (1631), 12 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:09,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:09,236 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:09,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-25 17:33:09,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:09,449 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1498083005, now seen corresponding path program 4 times [2022-11-25 17:33:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:09,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542066601] [2022-11-25 17:33:09,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:33:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:09,452 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:09,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 17:33:09,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:33:09,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:09,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 17:33:09,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:09,815 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:33:09,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:33:10,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 17:33:10,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:10,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2022-11-25 17:33:10,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:33:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:10,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:10,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:10,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 188 [2022-11-25 17:33:10,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 184 [2022-11-25 17:33:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:16,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542066601] [2022-11-25 17:33:16,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542066601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:16,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:33:16,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-11-25 17:33:16,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365933185] [2022-11-25 17:33:16,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:16,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:33:16,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:33:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:33:29,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 319 [2022-11-25 17:33:29,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 104 transitions, 897 flow. Second operand has 15 states, 15 states have (on average 127.4) internal successors, (1911), 15 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:29,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:29,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 319 [2022-11-25 17:33:29,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:33,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:33:34,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:33:36,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:33:47,059 INFO L130 PetriNetUnfolder]: 15275/29926 cut-off events. [2022-11-25 17:33:47,059 INFO L131 PetriNetUnfolder]: For 183179/185944 co-relation queries the response was YES. [2022-11-25 17:33:47,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145087 conditions, 29926 events. 15275/29926 cut-off events. For 183179/185944 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 252727 event pairs, 2461 based on Foata normal form. 3231/32099 useless extension candidates. Maximal degree in co-relation 145000. Up to 10960 conditions per place. [2022-11-25 17:33:47,555 INFO L137 encePairwiseOnDemand]: 313/319 looper letters, 169 selfloop transitions, 40 changer transitions 0/222 dead transitions. [2022-11-25 17:33:47,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 222 transitions, 2126 flow [2022-11-25 17:33:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:33:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:33:47,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1867 transitions. [2022-11-25 17:33:47,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4180474697716077 [2022-11-25 17:33:47,559 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1867 transitions. [2022-11-25 17:33:47,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1867 transitions. [2022-11-25 17:33:47,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:47,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1867 transitions. [2022-11-25 17:33:47,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 133.35714285714286) internal successors, (1867), 14 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:47,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 319.0) internal successors, (4785), 15 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:47,567 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 319.0) internal successors, (4785), 15 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:47,568 INFO L175 Difference]: Start difference. First operand has 183 places, 104 transitions, 897 flow. Second operand 14 states and 1867 transitions. [2022-11-25 17:33:47,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 222 transitions, 2126 flow [2022-11-25 17:33:49,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 222 transitions, 2017 flow, removed 48 selfloop flow, removed 7 redundant places. [2022-11-25 17:33:49,600 INFO L231 Difference]: Finished difference. Result has 189 places, 136 transitions, 1312 flow [2022-11-25 17:33:49,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1312, PETRI_PLACES=189, PETRI_TRANSITIONS=136} [2022-11-25 17:33:49,600 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 137 predicate places. [2022-11-25 17:33:49,600 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 136 transitions, 1312 flow [2022-11-25 17:33:49,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 127.4) internal successors, (1911), 15 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:49,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:49,601 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:49,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:49,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:49,801 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1722095866, now seen corresponding path program 5 times [2022-11-25 17:33:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:49,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331730957] [2022-11-25 17:33:49,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:33:49,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:49,803 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:49,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14272053-2f22-4359-ae4e-b094ca410e3b/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 17:33:49,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:33:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:49,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:33:49,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:50,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-25 17:33:50,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:33:51,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:51,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 180 treesize of output 38 [2022-11-25 17:33:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:33:51,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:00,014 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2022-11-25 17:34:00,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 674 treesize of output 530 [2022-11-25 17:34:00,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 277 [2022-11-25 17:34:00,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 269